diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/fcntl.c | 42 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/fcntl.c | 29 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/kernel-features.h | 5 |
4 files changed, 78 insertions, 5 deletions
diff --git a/ChangeLog b/ChangeLog index 4ad59290dc..a54bc10848 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,12 @@ 2009-10-29 Ulrich Drepper <drepper@redhat.com> + [BZ #10840] + * sysdeps/unix/sysv/linux/kernel-features.h: Define + __ASSUME_F_GETOWN_EX. + * sysdeps/unix/sysv/linux/fcntl.c: Implement F_GETOWN using F_GETOWN_EX + if possible. + * sysdeps/unix/sysv/linux/i386/fcntl.c: Likewise. + * sysdeps/unix/sysv/linux/sh/bits/fcntl.h: Define F_OWNER_* and f_owner_ex. * sysdeps/unix/sysv/linux/powerpc/bits/fcntl.h: Likewise. diff --git a/sysdeps/unix/sysv/linux/fcntl.c b/sysdeps/unix/sysv/linux/fcntl.c index 1f5aca14a4..b19654c625 100644 --- a/sysdeps/unix/sysv/linux/fcntl.c +++ b/sysdeps/unix/sysv/linux/fcntl.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2000, 2002, 2003, 2004 Free Software Foundation, Inc. +/* Copyright (C) 2000, 2002, 2003, 2004, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -23,6 +23,40 @@ #include <stdarg.h> #include <sys/syscall.h> +#include <kernel-features.h> + + +#ifdef __ASSUME_F_GETOWN_EX +# define miss_F_GETOWN_EX 0 +#else +static int miss_F_GETOWN_EX; +#endif + + +static int +do_fcntl (int fd, int cmd, void *arg) +{ + if (cmd != F_GETOWN || miss_F_GETOWN_EX) + return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); + + INTERNAL_SYSCALL_DECL (err); + struct f_owner_ex fex; + int res = INTERNAL_SYSCALL (fcntl, err, 3, fd, F_GETOWN_EX, &fex); + if (!INTERNAL_SYSCALL_ERROR_P (res, err)) + return fex.type == F_OWNER_GID ? -fex.pid : fex.pid; + +#ifndef __ASSUME_F_GETOWN_EX + if (INTERNAL_SYSCALL_ERRNO (res, err) == EINVAL) + { + res = INLINE_SYSCALL (fcntl, 3, fd, F_GETOWN, arg); + miss_F_GETOWN_EX = 1; + return res; + } +#endif + + __set_errno (INTERNAL_SYSCALL_ERRNO (res, err)); + return -1; +} #ifndef NO_CANCELLATION @@ -36,7 +70,7 @@ __fcntl_nocancel (int fd, int cmd, ...) arg = va_arg (ap, void *); va_end (ap); - return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); + return do_fcntl (fd, cmd, arg); } #endif @@ -52,11 +86,11 @@ __libc_fcntl (int fd, int cmd, ...) va_end (ap); if (SINGLE_THREAD_P || cmd != F_SETLKW) - return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); + return do_fcntl (fd, cmd, arg); int oldtype = LIBC_CANCEL_ASYNC (); - int result = INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); + int result = do_fcntl (fd, cmd, arg); LIBC_CANCEL_RESET (oldtype); diff --git a/sysdeps/unix/sysv/linux/i386/fcntl.c b/sysdeps/unix/sysv/linux/i386/fcntl.c index b27373d24b..5544d6e0d9 100644 --- a/sysdeps/unix/sysv/linux/i386/fcntl.c +++ b/sysdeps/unix/sysv/linux/i386/fcntl.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2000,2002,2003,2004,2006 Free Software Foundation, Inc. +/* Copyright (C) 2000,2002,2003,2004,2006,2009 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -30,6 +30,13 @@ int __have_no_fcntl64; #endif +#ifdef __ASSUME_F_GETOWN_EX +# define miss_F_GETOWN_EX 0 +#else +static int miss_F_GETOWN_EX; +#endif + + #if defined NO_CANCELLATION && __ASSUME_FCNTL64 == 0 # define __fcntl_nocancel __libc_fcntl #endif @@ -119,6 +126,26 @@ __fcntl_nocancel (int fd, int cmd, ...) assert (F_SETLK - F_SETLKW == F_SETLK64 - F_SETLKW64); return INLINE_SYSCALL (fcntl, 3, fd, cmd + F_SETLK - F_SETLK64, &fl); } + case F_GETOWN: + if (! miss_F_GETOWN_EX) + { + INTERNAL_SYSCALL_DECL (err); + struct f_owner_ex fex; + int res = INTERNAL_SYSCALL (fcntl, err, 3, fd, F_GETOWN_EX, &fex); + if (!INTERNAL_SYSCALL_ERROR_P (res, err)) + return fex.type == F_OWNER_GID ? -fex.pid : fex.pid; + +#ifndef __ASSUME_F_GETOWN_EX + if (INTERNAL_SYSCALL_ERRNO (res, err) == EINVAL) + miss_F_GETOWN_EX = 1; + else +#endif + { + __set_errno (INTERNAL_SYSCALL_ERRNO (res, err)); + return -1; + } + } + /* FALLTHROUGH */ default: return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); } diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h index ff065effb5..f48e644e09 100644 --- a/sysdeps/unix/sysv/linux/kernel-features.h +++ b/sysdeps/unix/sysv/linux/kernel-features.h @@ -542,3 +542,8 @@ # define __ASSUME_PREADV 1 # define __ASSUME_PWRITEV 1 #endif + +/* Support for F_GETOWN_EX was introduced in 2.6.32. */ +#if __LINUX_KERNEL_VERSION >= 0x020620 +# define __ASSUME_F_GETOWN_EX 1 +#endif |